01 Solid State, Fiber, and Other Laser Sources
        Solid-state lasers and amplifiers
        Fiber Lasers; Waveguide lasers
        Mid-infrared lasers
        Optical frequency comb sources
        Wavelength tuning techniques and tunable lasers; wavelength conversion
        Techniques for thermal management and beam quality control
        Novel pump sources and pumping configurations
        ns-pulse generation; amplitude and frequency stability
        Advanced laser crystals and ceramics, and glasses
        Spectroscopic characterization of solid-state gain media
        Laser characterization and modeling

    02 Ultrafast and Nonlinear Phenomena
        Ultrafast lasers and amplifiers, ultrafast optical parametric oscillators/amplifiers
        Nonlinear frequency conversion in emerging materials
        Ultrafast pulse control and characterization technologies
        Characterization technologies of ultrafast phenomena
        Nonlinear/ultrafast spectroscopy, imaging and methodology
        Extreme nonlinear optics
        Novel nonlinear processes and strong-field processes
        Novel nonlinear optical materials and devices
        Ultrafast nano-photonics and plasmonics
        Nonlinearity in micro- and nano-photonic structure
        Novel applications of nonlinear optic phenomena
        Nonlinear quantum optics

    03 Infrared and Terahertz Technologies and Applications
        THz characterization of novel materials
        THz properties of materials for technology
        THz phenomena, in particular, relevant for technology
        THz generation, detection, modulation and propagation
        Novel concepts in THz spectroscopy and imaging
        Devices and systems for THz technology
        Novel applications of THz radiation

    04 High Power, High Energy Lasers
        High-energy and high-power lasers
        Short-pulse and high-peak power lasers
        Front ends, devices, pump sources
        Large aperture optics and novel active optics
        Optical materials
        Frequency conversion
        Thermal problems
        Laser induced damages

    05 Laser Processing and Innovative Applications
        Dynamics and modeling of laser-matter interaction
        Ultra-short pulse laser processing
        High power SSL and fiber laser processing
        Advanced laser processing toward industrial application
        Laser additive manufacturing
        Surface nano/micro structuring and surface modification
        In-process monitoring and time resolved measurements in laser processing
        Optics and systems for laser micro-processing
        AI in laser processing

    06 Optical and Photonic Metrology
        Optical devices, instruments, and technologies for precision measurements
        Frequency comb, lasers, broadband, narrowband and tunable light sources for optical metrology
        Length, distance and dimensional metrology
        Time and frequency metrololgy
        Precision interferometry, spectroscopy, imaging, sensing and other novel measurement methods
        Optical transmission and dissemination of time and frequency
        Conversion between optical and microwave frequencies
        Uncertainty evaluation for optical and photonic metrology
        Optical and photonic measurement systems for industrial applications

    07 Quantum Optics, Atomic Physics and Quantum Information
        Quantum optics: quantum states of light, e.g., entanglement, squeezing, etc.
        Atom physics: ultracold atoms and molecules, Rydberg atoms, trapped ions, optical lattices, etc.
        Coherent atom-photon interaction, e.g., electromagnetically-induced transparency, stationary light, etc.
        Quantum information and generalized quantum measurement: theory and experiment
        Solid-state and atomic sources of quantum states of light, e.g., color centers, quantum dots, etc.
        Detecting quantum states of light, e.g., SNSPD, semiconductors, frequency upconversion, etc
        Quantum computation with various qubit platforms
        Quantum communication, including entanglement distribution, quantum cryptography, quantum memory, quantum repeater, etc.
        Quantum-enhanced metrology and quantum imaging
        Artificial quantum systems, including superconducting qubits, quantum opto-mechanics, etc.

    08 Micro-, Nano-, and Low-Dimensional Photonics
        Micro/nano-photonic active and passive devices using photonic crystals, surface plasmons, and metamaterials
        High-performance nanolasers, including VCSELs, photonic crystal lasers, plasmonic lasers, and topological lasers
        Optical applications of low-dimensional materials, including classical and quantum light sources
        New optical feedback mechanisms and high-Q resonators, including bound states in the continuum and photonic topological insulator
        High-efficiency nonlinear micro/nano-photonics
        Engineered light-matter interactions, including opto-mechanics and optical trapping
        Complex integrated photonic devices and advanced applications
        Novel nanofabrication techniques and materials

    09 Optical Communication Systems and Networks
        Fiber-optic communication systems
        WDM, OTDM, SDM, and optical subcarrier-multiplexed technologies
        Free-space and underwater optical communication links and the mitigation of channel effects
        Effects of fiber nonlinearities and other transmission impairments on system performance
        System applications of optical amplifiers and photonic devices
        All-optical processing in devices, subsystems, and networks
        Advanced optical modulation formats, coherent detection, and advanced receivers
        Digital signal processing and error correction techniques for optical systems
        Telecommunications applications of microwave photonics
        Network elements and subsystems for routing and switching
        Architecture, networking, control and management technologies for optical networks

    10 Optical Fiber and Waveguide Technologies
        Design and fabrication of optical fibers and waveguides
        Micro-structured, photonic bandgap, and specilaty fibers
        Passive waveguide devices, such as filters, multiplexers, etc.
        Optical fiber and waveguide device design using machine learning
        Multimode and multicore fibers and waveguides
        Non-silica and multi-material optical fibers and waveguides
        Propagation, dispersion, and polarization related effects in fibers, waveguides, and free space
        Nonlinear effects, scattering, and propagation related transmission impairments in optical fibers
        Characterization and measurement techniques for fibers and waveguides
        Non-telecom (including biophotonic and astrophotonic) applications of fiber and waveguide technologies

    11 Semiconductor and Integrated Photonic Devices
        Laser diodes, LEDs and semiconductor optical amplifiers
        Photodetectors
        Modulators and switches
        Comb sources
        Passive devices including filters, multiplexers, and MEMS
        Nonlinear devices
        Quantum photonic devices
        PICs for communications - interconnects, transceivers and switches
        Sensors for biomedical, structural, metrology, distance
        PICs for novel computing paradigms - quantum, neuromorphic, optical
        Heterogeneous and hybrid photonic integration
        New materials for integrated photonics
        Photonic-electronic co-integration, co-design and co-simulation
        Packaging technology for integrated photonics
        Optoelectronic device testing and reliability

    12 Microwave Photonics and Optical Signal Processing
        Radio-over-fiber (RoF) subsystems and systems
        Optical-wireless integration, including multi-technology converged transmission systems
        Microwave photonic devices and subsystems
        High-frequency systems and applications using microwave, millimeter and Terahertz photonics
        Optical X-haul (fronthaul, midhaul, and backhaul) systems for advanced wireless communications
        Free space optical communication and visual light communication systems
        Optical-wireless subsystems for non-telecom applications such as remote sensing and lidar
        Photonic computing, programmable and neuromorphic photonics
        Active optical signal processing
        Passive optical signal processing subsystems
        Photonic signal processing
        Optical or opto-electronic signal processing
        Optical signal processing in spatially diverse systems

    13 Biophotonics and Applications
        Molecular and Cellular Imaging
        Clinical & Translational Biophotonics
        Optical Tomography and Tissue Optics
        Nanobiophotonics
        Neurophotonics
        Computational Optical Microscopy
        Biophotonic Enabling Technologies

    14 Plasmonics and Metamaterials
        Fundamental plasmon and polariton optics
        Novel physics for plasmonics and metamaterials, such as parity-time symmetric and non-Hermitian photonics.
        Novel plasmonics and metamaterial systems
        Plasmonic enhanced phenomena
        Novel applications, such as opto-mechanics, optical trapping, and wavefront shaping.
        Light manipulation with plasmonics and metamaterials
        Novel fabrication techniques and materials for plasmonics and metamaterials
        Ultrafast, nonlinear, and active plasmonics and metamaterials
        Quantum and topological plasmonics and metamaterials
        Biological/chemical sensing and spectroscopy using plasmonics and metamaterials
        Near-field examination and other characterization techniques
        Time-varying photonics with plasmonics and metamaterials
        Active, tunable, reconfigurable plasmonics and metamaterials
        Plasmonics and metamaterials for energy

    15 Optical Sensors, Display, and Imaging Systems
        Advances in Microscopy and Biomedical Imaging
        3D sensing and imaging technologies
        Computational Optical Sensing and Imaging
        Optical Metrology and Topography
        Advances in Astronomical Imaging
        Digital Holography and Quantitative Phase Imaging
        3D display and visualization technologies
        Multimodel sensing and imaging
        Spectroscopy and Hyperspectral imaging
        Novel Optical Sensors and Display
        Deep optics/Artificial intelligence in imaging and display
        Emerging Applications of Imaging, Display and Sensing Technologies

    16 Machine Learning in Optics and Photonics
        All aspects of AI & computational technology for optics and photonics
        Optical Computing platforms
        Photonic artificial intelligence : photonic neural network/devices/systems
        Artificial Intelligence/Machine Learning for Imaging and Spectroscopy
        Computatinal imaging and Machine Learning
        Inverse Design and Machine Learning for metaoptics
        Machine learning techniques for optical/photonic simulation and optimization
        Computational optics and machine learning